public class Example5_1{
    public static void main(String[] args) {
        Student zhang=new Student();
        zhang.age=17;
        zhang.number=100101;
        zhang.showPeopleMess();
        zhang.tellNumber();
        int x=9,y=29;
        System.out.print("会做加法：");
        int result=zhang.add(x,y);
        System.out.printf("%d+%d=%d\n",x,y,result);
        UniverStudent geng=new UniverStudent();
        geng.age=21;
        geng.number=6609;
        geng.showPeopleMess();
        geng.tellNumber();
        System.out.print("会做加法：");
        result=geng.add(x,y);
        System.out.printf("%d+%d=%d\t",x,y,result);
        System.out.print("会做乘法：");
        result=geng.multi(x,y);
        System.out.printf("%dx%d=%d\n",x,y,result);
    }
}
